UNIX for Dummies Questions & Answers

a|abc|0|1
a|abc|2|3
b||3|5
c|def||7
d|def|0|1

a|abc|0|1
a|abc|2|3
d|def|0|1

awk -F'|' '!/^$/' input

sed '/||/d' file
a|abc|0|1
a|abc|2|3
d|def|0|1

sed -r '/\|\||^\||\|$/d' file

awk '/\|\|/ {next} 1'  Input_file

a|abc|0|1
a|abc|2|3
d|def|0|1

awk '/^\||\|\||\|$/ {next} 1' file
      --- ---- ---
       |   |    |
       |   |    empty field on the end of the line
       |   empty field somewhere in the middle
       empty field on the beginning of the line